Just sold my MH after 7 years of ownership. Bought it when it was 10 years old, maintained it very well, used it alot, and sold it for about 65% of initial investment.
I never kept track of the dollars since I knew it was a poor investment. I do miss the freedom that it provided while on the road. I wouldn't say "priceless" since there are other forms of travel which are also enjoyable.
What I don't miss is the feeling that the rig was always a liability. All I needed was a blown engine or tranny to really screw things up.